Fastener with anchoring head

ABSTRACT

A FASTENER HAVING A DRIVING HEAD, A POINTED END AND A RADIALLY EXPANDABLE PORTION CONSISTING OF A PLURALITY OF BANDS EXTENDING BETWEEN A FIXED SUHEAD AND A COLLAR WHICH IS MOVABLE TOWARD THE SUBHEAD TO ACCOMPLISH THE EXPANSION OF THE CONNECTING BANDS. THE EXPANDED HEAD IS RECEIVED IN A MASS OF CONCRETE PENDING SOLIDIFICATION FOR SECURELY ANCHORING THE FASTENER WHEREBY THE EXPOSED   POINTED END MAY BE USED AS A HANGER TO SUPPORT ACCESSORIES TO THE CONCRETE MASS.

R; c. BAHR FASTENER WITH ANCHORING HEAD Nov. 2, 1971 Filed Nov. 12, 1969H Z70enf0/ United States Patent 3,616,591 FASTENER WITH ANCHORING HEADRannalt C. Bahr, 146 Ingalton Ave., West Chicago, Ill. 60185 Filed Nov.12, 1969, Ser. No. 875,808 Int. Cl. E04b 1/41 US. Cl. 52--701 2 ClaimsABSTRACT OF THE DISCLOSURE expansion of the connecting bands. Theexpanded head is received in a mass of concrete pending solidificationfor securely anchoring the fastener whereby the exposed pointed end maybe used as a hanger to support accessories to the concrete mass.

This invention relates to improvements in the design and construction ofa fastening member, such as a nail, and more particularly a fastenerhaving anchorage in a mass of concrete by embedment of a portion thereofin said mass while said mass of concrete is undergoing solidification ina concrete forming member and which also provides a pointed end portionoutside the confines of said concrete mass for use in establishing anailed connection between said concrete forming member and a rigidsupporting sub-structure of wood or the like pending ultimatewithdrawall of said forming member and said sub-structure from thesolidified concrete mass.

It is also an object of this invention to provide improved anchoragemeans in conjunction with a fastener of the type indicated wherebywithdrawal of the form member and its sub-structure may be readilyaccomplished without risk of loosening or pulling out the fastener fromits embedded position within the concrete mass and thus assureavailability of the end portion of the fastener outside the confines ofthe concrete mass for use as a hanger for supporting accessoriesrequiring attachment to the concrete mass.

It is also an object of this invention to provide a fastener of thecharacter indicated which is readily manufactured on an extensive scaleat relatively low cost and also provide an article which can be easilyhandled by the operator preparatory to installation thereof and whichcan be easily and rapidly placed in installed position.

With the above and other objects in view, as will be apparent, thisinvention consists in the construction, combination and arrangement ofparts, all as hereinafter more fully described, explained andillustrated in the accompanying drawing wherein:

FIG. 1 is a perspective view of a fastener constructed in accordancewith and embodying the present invention as the same appears preparatoryto installation.

FIG. 2 is an enlarged vertical section taken along line 22 of FIG. 1.

FIG. 3 is a perspective view of a fastener as shown in FIG. 1 as thesame appears in an installed position relative to a concrete formingmember and a supporting sub-structure and preparatory to the receptionof a concrete mass within the area of the forming member occupied by thefastener.

FIG. 4 is an enlarged fragmentary section through a solidified mass ofconcrete with the fastener of this invention shown as it appears uponwithdrawal of the concrete forming member and the supportingsub-structure therefrom, and also illustrating the use of the exposedshank portion of the fastener as an accessory hanger.

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Referring more particularly to the drawing, a fastener exemplifying thepresent invention is shown as including an elongated shank 10 having adriving head 11 at one end thereof and a pointed tip 12 at its otherend. Reference numeral 13 designates a collar which occupies an initialposition in encircling relation to the area of the shank 10 immediatelyrearward of the pointed tip 12. Such initial position of the collar 13is established by means of a sub-head 14 formed integrally with theshank 10 and occupying a position in forwardly spaced relation to thedriving head 11 as shown in FIG. 2 of the drawing, and a series of metalbands 15 having spot welded connection at one end thereof to the subhead14 and at the other end fixed to the collar 13 to form aninterconnection extending axially of the shank 10 between the collar 13and the sub head 14. The bands 15, as shown in FIG. 1, are preferablydefined by areas of a metal tube like structure which are separated byslots 16 which extend approximately the length of the distance betweenthe collar 13 and the sub head 14.

As shown in FIG. 3 of the drawing, wherein the fas tener of thisinvention is illustrated in installed relation to a concrete formingmember 17 and a supporting substructure 18 of plywood or the like, itwill be seen that the axially compressive forces applied at the surfaceof the collar 13 engaging the inner surface of the concrete form memberabout the opening through which the pointed end of the shank 10 extendsand at the junction of the bands 15 with the sub head 14 has caused thebands to spread outwardly to form radially extending wings as anincident to the action of driving the pointed end of the fastenerthrough the opening in the concrete form member and into thesub-structure 18. The wings thus developed by this action of the bands15 are accordingly in a position to be completely embedded within a massof concrete 19 confined in the form member 17 about the area occupied bythe driving head of the fastener and said bands 15 as to assurepermanent anchorage of the embedded portion of the fastener while themass of concrete 19 containing said embedded portion of the fastenerundergoes solidification.

After such solidification of the concrete mass, the supportingsub-structure 18 and the concrete forming member 17 may be dismantledand withdrawn from a fastened position about the pointed end of thefastener without risk of loosening or pulling out of the fastener fromits embedded position and thereby also rendering the exposed pointed endportion of the anchored fastener accessible for use as a hanger forsupporting accessories 20 as shown in FIG. 4 in order to provide forattachment of said accessories to the concrete mass. To this end, theportion of the shank 10 thus exposed outside the confines of theconcrete mass 19 is preferably knurled or roughened as shown at lines 21in FIG. 4 and thereby the shank 10 is prepared for receiving a speed nut22 so as to more readily establish clamped engagement with the accessorymember 20, as shown.

It will be manifest that the fastener of this invention is of suchnail-like shape that it may be held with other like fasteners in closelybunched orderly arrangement in the hand of a workman withoutinterference to freeing such fasteners one at a time as the fastener isapplied to the article of work with which the fastener is to beoperatively associated.

While only one more or less specific embodiment of the present inventionhas been shown and described, it is to be understood that this is forthe purpose of illustration only, and that the invention is not to belimited thereby, but its scope is to be determined by the appendedclaims.

What is claimed is:

1. A fastener having a piercing point at one end thereof and a drivinghead at its other end for applying impact on said fastener to drive saidpoint into a rigid supporting sub-structure of wood or the like wherebya concrete form member may be secured to said sub-structure viaextension of said pointed end of the fastener through an opening in thewall of said concrete form member facing said sub-structure, and meansfor securely anchoring the end of the nail with the driving head in amass of concrete pending solidification of said mass of concrete withinthe area of the form member containing said driving head of the fastenerwhile allowing withdrawal of said form member and said sub-structurefrom said pointed end of the fastener after such solidification of saidconcrete mass, said means including a collar slidably supported on saidfastener between said driving head and said pointed end which collar hasengagement with the inner surface of said concrete form member about theopening through which the pointed end of said fastener extends, a fixedsub-head on said fastener between said driving head and the areaoccupied by said collar, and axially extending bands interconnectingsaid collar and said sub-head which bands spread outwardly to formradially extending wings by collapse of said bands under axiallycompressive forces applied at the surface of the collar engaging saidinner surface of the concrete form member and at the junction of saidbands with said subhead in response to impact applied to the drivinghead of said fastener to drive said pointed end thereof into a positionto secure said concrete form member to a supporting sub-structure.

2. A fastener according to claim 1 wherein the portion of the fastenerexposed outside the confines of said concrete mass is provided with aknurled surface.

References Cited UNITED sTATEs PATENTS 2,660,084 11/1953 Newman 85-282,913,953 11/1959 Tendler 8571 15 3,099,108 7/1963 Kalkbrenner 52-7013,270,793 9/1966 Polmon 8570 3,340,761 9/1967 Fischer 857l 3,398,6278/1968 Tendler 85 71 FOREIGN PATENTS 245,283 6/1963 Austria 85-70737,284 10/1932 France 85 305,053 4/1955 Switzerland 52 704 2 MARIONPARSONS, JR., Primary Examiner US. Cl. X.R.

